钙矾石结晶化抑制剂对膨胀剂膨胀率的影响

Effect of ettringite crystallization inhibitors on expansion rate for expansion admixture

通过砂浆棒长度试验,研究了不同掺量钙矾石结晶化抑制剂对硫铝酸盐膨胀剂膨胀性能的抑制效果,证实了钙矾石结晶化抑制剂对膨胀的抑制是有效的;随着抑制剂掺量的增加,抑制效果先增强后减弱;并提出了抑制剂的合理掺量,以0.1%~0.2%为宜。

The length of mortar was tested and different inhibitor dosages were used to determine the effect of ettringite crystallization inhibitors on expansion and to identify the suitable inhibitor dosage.The results show that：it＇s effective to lower expansion incorporated inhibitors;with in- creasing of inhibitor dosages,the inhibition effect is enhanced but weakened later;and the best content will be about 0.1%~0.2%.